Chevrolet 70 1969 Series, Shop Manual

Page: 784 / 913

TRANSMISSION AND CLUTCH 7-38
3. Install bearing retainer nut or snap ring (78).
4. Assemble the pilot bearing in the main drive gear as
follows:
a. If a new pilot bearing is used it comes from the
factory with a plastic sleeve. Stand drive gear on
end. Set bearing and sleeve over bearing pocket
in drive gear. Slide bearing rollers and cage from
plastic sleeve into bearing pocket.
NOTE: When new bearing is used alw ays in­
stall new bearing race on mainshaft.
b. If old pilot bearing is used, set rollers in bearing
cage and hold in place with a rubber band. Slide
bearing rollers and cage from rubber band into
bearing pocket.
Use caution when installing drive gear and pilot bearing
on pilot end of mainshaft, and into transmission clutch
housing.
COUNTERSHAFT ASSEMBLY
1. Install W oodruff keys (89) in 3rd and 4th gear slots
in countershaft (52).
2. Lubricate the countershaft (52) and bore of each gear
before installing gears on countershaft.
3. Using an arbor press, start 3rd speed gear (86)
straight on countershafi (52) with long hub of gear
toward the rear. Align keyway in gear with key in
countershaft and press gear tight against shoulder on
shaft.
4. Press 4th speed gear (85) on countershaft (52) in same
manner used to install the 3rd speed gear. Long hub
of gear goes toward rear.
5. Install drive gear spacer (84) and drive gear key (89).
6. Press countershaft drive gear (4) on countershaft (52)
with long hub toward rear. Install gear in same way
used to install other gears.
7. Install snap ring (5) in groove of countershaft (52). Be
sure snap ring is well seated and locked in groove.
MAINSHAFT ASSEMBLY
1. Clam p mainshaft (43) in a vise with soft jaws with
front end up.
2. Drop 2nd speed gear locating washer (48) into posi­
tion over mainshaft (43).
3. With lock pin (50) in place in 2nd speed gear bushing
sleeve (49), install bushing sleeve on mainshaft with
lock pin toward upper end of mainshaft.
4. To insure a proper tight stack-up between 2nd speed
gear locating washer (48), 2nd speed gear bushing
sleeve (49), 2nd speed gear retaining washer (18), and
snap ring (17), the following procedure should be ex­
ercised.
a. Before 2nd speed gear (51) is installed on bush­
ing sleeve (49), place retaining washer (18) on
mainshaft and hold down securely against bush­
ing sleeve (49).
b. Holding snap ring (17) parallel to retaining
washer (18), slip snap ring into snap ring groove
in mainshaft (43).
c. Select variable thickness 2nd speed gear retaining
washers (18) until a washer is selected that will
assure a tight stack-up through the assembly.
d. Remove selected retaining washer (18) and install
2nd speed gear (51) over bushing sleeve (49).
e. Place selected retaining washer (18) in position
on shaft and install snap ring (17) so it is locked
securely in the groove.
NOTE: End play on 2nd speed gear (50) must
be a minimum of .006 inches. 2nd speed gear
retaining washers (18) are available in various
thicknesses.
5. Place 2nd and 3rd speed synchronizer assembly (16),
large end of hub toward rear, on splines of mainshaft
(43) and drop into position. Install 3rd speed gear lo­
cating thrust washer (15) on mainshaft (43).
6. Position 3rd speed gear and bushing assembly (14)
over mainshaft (43) with toothed hub down and drop
into place.
7. Position 4th speed gear locating washer (13) on m ain­
shaft.
NOTE: When assembling 4th speed gear bush­
ing sleeve and lock pin assembly in step 8 fol­
lowing, make certain sleeve lock pin is centered
in a spline of mainshaft before pressing sleeve
into place. Failure to do this may shear head of
lock pin and cause bushing seizure (fig. 12P).
8. With lock pin in place in 4th speed gear bushing
sleeve (12), install bushing sleeve on mainshaft (43)
with lock pin (7) toward pilot or front end of m ain­
shaft (43). It may be necessary to use a suitable sleeve
and ham m er to properly install sleeve (12).
9. To insure a proper tight stack-up between the 4th
speed gear locating washer (13), 4th speed gear bush­
ing sleeve (12), 4th speed gear selective retainer wash­
er (10), and snap ring (9), the following procedures
must be accomplished.
a. Before the 4th speed gear (11) is installed on
bushing sleeve (12), place retaining washer (10)
on mainshaft (43) and hold dow'n securely
against bushing sleeve (12).
b. Whilte holding snap ring (9) parallel to the re­
taining washer, slip snap ring into snap ring
groove in mainshaft (43). Select variable thickness
retaining washers (10), until a washer is selected
that will assure a tight stack-up through the
assembly (fig. I3P).
c. Remove selected washer (10) and install 4th speed
gear and bushing assembly (11) over bushing
sleeve (12).
d. Place selected washer (10) in position; then in­
stall snap ring (9) into groove of mainshaft (43).
Be sure snap ring is well seated and securely
locked in groove.
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